抄録
Recently, energy saving and global warming gas discharge reduction become the important problem with such as the automobile industry or the aircraft industry. Inconel 718, which has excellent mechanical and chemical properties, has been selected for use in many jet engine parts. Moreover, SUJ2 has excellent wear resistance, has been selected for use in such as a bearing. However, Inconel 718 is low thermal conductivity and SUJ2 is high hardness, so these are difficult material to cut. Consequently, wet cutting is generally adopted for the cutting of difficult-to-cut-materials. Wet cutting, which uses a large amount of cutting fluid, is costly and requires considerable energy for maintenance and disposal of the cutting fluid, making this cutting method environmentally unfriendly. To reduce the associated cost and environmental load, the near-dry cutting method, which uses a very small amount of cutting fluid, may be preferable for cylindrical cutting of Inconel 718 and SUJ2. However, this method has some drawbacks, such as the cutting stock removal rate and the wear on cemented carbide tools. For example, the cutting stock removal rate is lower than with wet cutting because cutting edge fracture occurs easily in near-dry cutting. In this report, we experimentally examined the relationship between near-dry cutting and tool fracture.
